Overview
The Deck of Cards API lets you simulate a real deck of cards — create shuffled decks, draw cards, and manage multiple piles for different players. It's completely free with no authentication needed, making it perfect for building card game prototypes or learning how to chain multiple API calls together. The API maintains state server-side using a deck_id, so cards you draw are removed from the deck just like real cards.
Beginner Tip
Save the 'deck_id' from your first shuffle response — you'll need it for every subsequent draw or pile operation with that deck.
Measurement Record
What actually happened when we called this API from our own infrastructure. Every value below was recorded by the request, not copied from the provider's documentation.
- Request
- GET https://deckofcardsapi.com/api/deck/new/shuffle/?deck_count=1
- Result
- HTTP 200 · application/json · 79 bytes · compressed
- Response time
- 698 ms (median of 3) · fastest 216 ms
- Transport
- TLSv1.3 · TLS_AES_256_GCM_SHA384 · certificate issued by Google Trust Services
- Browser CORS
- Allowed — Access-Control-Allow-Origin: *
- Served by
- cloudflare
- Recorded
- 2026-08-10
Fields Returned
Top-level fields present in the response we captured, with the type and value we actually received.
| Field | Type | Value received |
|---|---|---|
| success | boolean | true |
| deck_id | string | q534luum3zg9 |
| remaining | integer | 52 |
| shuffled | boolean | true |
Captured Response
Captured from a real request to https://deckofcardsapi.com/api/deck/new/shuffle/?deck_count=1 on 2026-08-10. Long arrays and nested objects are truncated to keep the shape readable.
{
"success": true,
"deck_id": "q534luum3zg9",
"remaining": 52,
"shuffled": true
} Field Reference
deck_id Unique identifier for your deck — required for all subsequent draw and pile operations. shuffled True if the deck has been shuffled at least once. remaining Number of cards still in the deck that haven't been drawn yet. Implementation Example
Calls a real endpoint of this API. Replace any placeholder credentials with your own key.
const url = "https://deckofcardsapi.com/api/deck/new/shuffle/?deck_count=1";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
How This API Fails
We deliberately sent this API a broken request and recorded exactly what came back on 2026-08-10. Knowing the shape of an error before you hit it makes error handling much easier to write.
Returned an HTML error page rather than JSON — worth knowing if your client assumes every response can be parsed as JSON.
Returned an HTML error page rather than JSON — worth knowing if your client assumes every response can be parsed as JSON.
Common Errors & Troubleshooting
Generated guidance based on this API's documentation, not observed by us. Treat it as a starting point and check against the provider's own error reference.
Measured Score Breakdown
Live HTTP request to the API endpoint
Fully tested on Aug 10, 2026
Technical Specifications
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